Structure and properties of NASICON synthesized by two different zirconium salts

Dang, Heng-Yao; Guo, Xing‐Min; Huang, Yongping; Rong, Jiang-qi

doi:10.1007/s12613-012-0626-y

Cited by 3 publications

(3 citation statements)

References 22 publications

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“…In the case of NVP|NZSP composites, some high-aspect-ratio, “needle-like”, features are nucleated throughout the microstructure. This was previously observed in microstructures of cold-sintered NZSP, spark-plasma-sintered NZSP, and in NZSP grown from a molten salt bath . Therefore, these microstructural features appear to be not unique to cold sintering but are rather a more general characteristic of NZSP-like materials processed under kinetically limited processes.…”

Section: Part 2: Tunable Diphasic Composites Of Nvp|cnf and Nvp|nzspsupporting

confidence: 69%

“…This was previously observed in microstructures of cold-sintered NZSP, 36 spark-plasma-sintered NZSP, 51 and in NZSP grown from a molten salt bath. 52 Therefore, these microstructural features appear to be not unique to cold sintering but are rather a more general characteristic of NZSP-like materials processed under kinetically limited processes. These "needle-like" structures notwithstanding, the microstructure of the NVP|NZSP appears fairly homogeneous, with the NZSP phase well dispersed within the NVP matrix (Figure 5D).…”

Section: Part 2: Tunable Diphasic Composites Ofmentioning

confidence: 99%

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Design and Sintering of All-Solid-State Composite Cathodes with Tunable Mixed Conduction Properties via the Cold Sintering Process

Grady

Fan

Ndayishimiye

et al. 2021

ACS Appl. Mater. Interfaces

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Electrodes for solid-state batteries require the conduction of both ions and electrons for extraction of the energy from the active material. In this study, we apply cold sintering to a model composite cathode system to study how low-temperature densification enables a degree of control over the mixed conducting properties of such systems. The model system contains the NASICON-structured Na3V2(PO4)3 (NVP) active material, NASICON-structured solid electrolyte (Na3Zr2Si2PO12, NZSP), and electron-conducting carbon nanofiber (CNF). Pellets of varying weight fractions of components were cold-sintered to greater than 90% of the theoretical density at 350–375 °C, a 360 MPa uniaxial pressure, and with a 3 h dwell time using sodium hydroxide as the transient sintering aid. The bulk conductivity of the diphasic composites was measured with impedance spectroscopy; the total conductivities of the composites are increased from 3.8 × 10–8 S·cm–1 (pure NVP) to 5.81 × 10–6 S·cm–1 (60 wt % NZSP) and 1.31 × 10–5 S·cm–1 (5 wt % CNF). Complimentary direct current polarization experiments demonstrate a rational modulation in transference number (τ) of the composites; τ of pure NVP = 0.966, 60 wt % NZSP = 0.995, and 5 wt % CNF = 0.116. Finally, all three materials are combined into triphasic composites to serve as solid-state cathodes in a half-cell configuration with a liquid electrolyte. Electrochemical activity of the active material is maintained, and the capacity/energy density is comparable to prior work.

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Section: Part 2: Tunable Diphasic Composites Of Nvp|cnf and Nvp|nzspsupporting

confidence: 69%

Section: Part 2: Tunable Diphasic Composites Ofmentioning

confidence: 99%

Design and Sintering of All-Solid-State Composite Cathodes with Tunable Mixed Conduction Properties via the Cold Sintering Process

Grady

Fan

Ndayishimiye

et al. 2021

ACS Appl. Mater. Interfaces

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“…In addition to the Na 3 Zr 2 Si 2 PO 12 phase, some Zr deficient compositions (Na 1+x Zr 2−x/3 Si x P 3−x O 12−2x/3 ) have also been synthesized using Na 2 CO 3 , NH 4 H 2 PO 4 , ZrO 2 and SiO 2 as initial ingredients [10]. Dang et al [11] have used different zirconium salts to synthesize NASICON. On the other hand, Ponrouch et al [12] used different Na salts to check the intrinsic physico-chemical properties of electrolytes for Na-ion batteries.…”

Section: Introductionmentioning

confidence: 99%

Optimization of High Conducting Na3Zr2Si2PO12 Phase by new Phosphate Salt for Solid Electrolyte

Jha

Pandey

Singh

2016

Silicon

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A composition of NASICON (Na 3 Zr 2 Si 2 PO 12 ) was synthesized by the solid-state reaction method using a new compound Na 2 HPO 4 2H 2 O. The X-ray diffraction patterns of all samples exhibit monoclinic Na 3 Zr 2 Si 2 PO 12 as a major phase with a very small amount of monoclinicZrO 2 . The maximum relative density (97 %) and maximum conductivity is obtained in the samples sintered at 1200 • C (N3) which is slightly higher than β-Al 2 O 3 . The activation energy is ∼ 0.20 eV for the N3 sample which is lower than for β-Al 2 O 3 . The dilatometeric study and Arrhenius plots confirmed a phase transition of NASICON from monoclinic to rhombohedral. The micro-structural study of the samples done by scanning electron microscopy (SEM) indicated a significant influence of the processing conditions on the microstructures. Raman spectroscopy demonstrated that the sample N3 exhibits minor structural changes compared to other samples.

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Characteristics and performance of NASICON-based CO2 sensor using Bi8Nb2O17 plus Pt as solid-reference electrode

Dang

Guo

2013

Sensors and Actuators B: Chemical

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Structure and properties of NASICON synthesized by two different zirconium salts

Cited by 3 publications

References 22 publications

Design and Sintering of All-Solid-State Composite Cathodes with Tunable Mixed Conduction Properties via the Cold Sintering Process

Design and Sintering of All-Solid-State Composite Cathodes with Tunable Mixed Conduction Properties via the Cold Sintering Process

Optimization of High Conducting Na3Zr2Si2PO12 Phase by new Phosphate Salt for Solid Electrolyte

Characteristics and performance of NASICON-based CO2 sensor using Bi8Nb2O17 plus Pt as solid-reference electrode

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